I have a custom WordPress theme that I have made myself.

When I insert an image into a post I only get the option to add the full size image (see below screenshot): enter image description here

In Settings > Media I have a number of different sizes defined. How come these options done appear when I'm inserting an image?

enter image description here

2 Answers 2


Have look at add_image_size and add to your theme's functions.php file:



Just like gurudeb said but remember that you will have to either replicate thumbnails or re upload the images so that the thumbnails in your defined size can be created

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